Jack Spine writes: "Air traffic control technology being implemented in one of the major transport hubs in the UK is 'not safe', according to air traffic controllers. The electronic flight data system (EFD) being phased in at Glasgow Prestwick Airport is too slow to handle real-time inputs, and could not cope with an outage that isolated it from the main air traffic system. Controllers had to scramble to handle the situation. Good luck if you're travelling to the UK anytime soon."